I think there are some major flaws with this lens.
Firstly, it's f3.5 - that is far too slow for a macro lens of this caliber.
Second, 30mm is too wide for macro, as you would have to be really close to your subject; especially as the NEX cameras use APS-C sized sensors.
It should be about 60mm at least for a decent macro lens.

f/3.5 is not an issue for macro photography. Normally you would have to stop down to get usable depth of field. A big reason most SLR macro lenses are f/2.8 is to allow the phase AF to keep working at full magnification. Contrast AF of NEX doesn't have the same limit and can work at higher effective apertures. If f/3.5 makes the lens smaller or cheaper, I think that is a positive.

As for the angle, it may not be to everyone's tastes, nor suit every situation, but it still is a macro. I want a wide angle macro myself for the different perspective it offers compared to longer focal length macro lenses. It doesn't replace them wholesale, but supplements them. A shorter focal length at this time means the lens can be smaller. I'd guess longer ones will appear in time.